Stuffing box



Dec. 30,1930. o, A, LABUs 1,787,317

'STUFFING Box Fild ont. 25, '1926 I @HW/l reference to its`useiii-connection with a j Patented nec. so. 193e i STATES PATENTorrlcliI oTvTo A. LABUS, R WISCONSIN RAPIDS, WISCONSIN, AssIGNoR, BYMEsNE vAssicur- MENTs, To NATIONAL CARBCNIC MACHINERY CoIvIPANmoFWISCONSIN RAPIDs, MWISCONSIN, A CoRIoRATIoN'oFy WISCONSIN l STUFFING'Rox 'Appucaun med october 23, 192s. ,serial No. 143,687.

' il, This invention relates to a stuffing box whichhas many fea-turesof general applicavtion,but has been -devised especiallywith piston rodofja'fluid or gas compressor.

' One object of the invention herein claimed is to provide a stufin'gbox with `a series of packing, pressure and separator rings, so arrangedas to forma connection between the end ofthe cylinder and the pistonrod, which L'will permit -the vlatter to reciprocate, but will notpermit any leakage of the gas or liquid Acontained within the cylinder.In the drawing:

Figure 1 isa section taken longitudinally of'the-stung box.v Y vligureQis a section taken on the line 2-2 i 'of Figure 1.

@Figure 3 is a sectionl taken on the line 3-3 of Figure 1. j j y Y Thestuiing box, shown in the drawings,

y' f comprises a substantially,cylindrical housing 18, having aperipheral flange 20 adaptedy to be bolted to the end of the cylinder. jThe housing 18 has a reduced inwardly extending portion 19 adapted toform the end of the cylinder, and also has a portion 21 which extendsoutwardly from the flange 20. The stung vbox housing is adapted toreceive centrally thereof a reciprocable p-iston rod 17 which has apiston head 16 rigidly secured to the inner end thereof. A bushing 47fits around the piston rod 17 within the inner portion 19 of thestufling box housing, and is formed with a head 45, which seats againsta shoulder 44 within the housing. j

f Thel stuing box packing is shown as being composed of a series ofmetal rings, packingr rings and separators arranged successively, andrepeated as illustrated in Figure 1. Starting with the upper or innerend of the stufing box, immediately adjacent to the head 45 of thebushing, there is a metal ring 48, which is provided internally with acounterbore 49, in which there is inserted a Babbitt orbronze floatingring 50... The ring 48 is iitted snugly to the inside bore of thehousing 18, but is fitted loosely with a clearance around the piston rod17, whereas the floating ring 50 has a perfect sliding fit on thepiston` rod, but is fittedv loosely with a clearance adjacent the sidevof the channel 49 in thering 48. Following the floating ring 50,

is fitted a leather washer 53, constituting an equalizing or expansionring.

The position of the leather expansion ring n 53 is of importance, and itwill be noted that theleather does not come in contact with the ``pistonrod. Such Contact would be undesirable, because at times the piston rod17 becomes heated, and would burn or char the leather.

Following the rings 52 and 53, there is a metal separator 54, afterwhich the rings 53, 52, 51 and 50v are repeated, the latter fitting intoone side of a counterbored double lantern 55, which has a peripheralchannel 56 and radial holes 57 to act as a gas and oil collectingchamber. rThis arrangement is followed by another series of packingrings and a second lantern `55, Whose peripheral channel .56 is in'communication with ports 58 through the stuiiing box housing, so thatoil may be forced to circulate through the stuffing box. Theleatherrings 53 serve to control the compression, as well as theexpansion of the packing, and also allow for lateralexpansion of theentire group of packing. While rubberhas been sometimes employed forthis purpose, leather is particularly advantageyous, since the oil whichis used to lubricate the piston rod is destructive to rubber.

Below the lowermost separator 54 is a packing gland 59, which ishollowed out to receive a series of soft packing ringsk 60, which areplaced between two metal packing rings 61. The packing rings areadjusted by means of a packing glandv 62 inserted within the end of thegland 59. The gland 59 is also surrounded by a soft packing ring 63,placed withinv the end of the stuffing box 18, and adj usted by means ofa metal ring 64 and a gland 65 which engages the end of the stuft"- ngbox. Thus, it will be seen that in addiurroundlng the ring 52, adjacentthe ring 448, there inside and outside.l

cylirider head, so that-the cylinder head and Yremo-ved Vor replaced.

i y tionto the'packii'ig between the stuffing boxl and'piston rod, theglandwhich adjusts this packing is itself provided with pack1ng,both 'ei The flange 2O is` adaptedA to seat directly f' 'againstv the endofithelcylinder, anda packing Y gland may be inserted between the inner`portionofthe stuiiing box housing andthe endV Y "portion of thecylinder, and lmay be adjusted" byn means of screws inserted., infholesj 46 'tapped inthe flange 20. The stuffing'box housing is formedas an integral part of the stuffing box may be removed bodilyto linspectthe interior of theV cylinder, and when replaced `will be in'perfectalinement, since its alinementis not vdependent upon the condi-Vtion-.or adjustment of the packing `between the cylinder headj'and thecylinder.

f The arrangement of the various packing Yrings within the stuffing boxinsures la gastight connection between the piston-rod and the head ofthe cylinder, and, 'of course, need not be disarranged when the cylinderhead is Vhile l have shownV and described in detail one form'in whichlthe invention may be embodied, itis to be noted that this construction's is snbject fto considerable modification with# features of theinvention as ,defined in the ing a peripheral flange adapted to besecured `directly to the end of a cylinder and a reducedyportionextending inwardly to form the head of the. cylinder, a Vbushingseated. within said 'reduced/portion, a metallic vring following my own,I-have hereto ing beyond the end of the counterbored an expansion ringabutting the end of the*A counterbored ring and located between theperiphery ofthe extended packing and the wall of the housing; aV metalseparator ring abutting the face of the extended packing and.

the expansion l,ring and extending vbetween the piston rodjand .thewall'of thehoufsing and means" following thefseparatoi` ring. forexertingpressure Yon thepackingpr' j 3. A stuiiing box for pistonrodscompris-V inga'substantially cylindrical housing; a mebut spacedslightly from the rod, said ring being counterbored at'its' innerV end;afloating ring closely-fitting the `piston within the counterbore, swith a clearance l between *its peripheral face andthe counterb'ore; .apair .of packing ringsrfollowing the floating ring and having adjacentinclined faces; one of ksaid rings abutting'the floating ring in thecounterbore and the other extendinggbeyond theinner end ofthecounterbored ring kwith a spacebetweenA its peripheral yface andthehousing; an expansion ring in ksaid space and ,abutting the inner end ofthe counterbored ring; a separator ring followingrthe last Apacking ringVand fthe expansion ringand abutting their inner faces:,said ringextending between the rodand the vwall of the housing, `other packingVelements following the c Aseparator ring and including a doublecounterbored lantern ring with packing ringsin s kfront of andbehind.the same;` and alg/'landV -ioo for adjusting said packing elements.

In testimony, that I claim the foregoing as aiiixed my signature. v OTTOA. LABUS'.,

thejbushingand fittingclosely within the housing but affordingaclearance for the' pis- Y ton rod, said ring being counterbored at its iinner edge, a floating ring fitting closely aroundthe piston rod Withinthe counterbore with a clearance between the outer edge of n thefloating ring and the counterbored ring,l vpacking. v rings followingthe counterbored Vring andjiioating ring, a'separator ring following thepacking rings, other packing elements following th'e'separator ringandincluding'a double-counterboredlantern ring with packing rings in frontof and behind.'

the,same,'and a glandvat'the outer end of the i .housing for adjustingsaid packing elements. v 2. A stuffing box for piston rods, comprisy`ing a substantially cylindrical housing, a metallic ring iittingclosely'within the housing but affording a clearance for the piston rod,said ring being counterbored at its inner edge, a floating ring ttingclosely around tallic ring fittingv closely within the yhousing thepiston rod within the counterbore with a elearance between the outeredge of the floating ring and the counterboredA ring, packing i -ringsfollowing the floating ring and extend-V

